Loose leaf binder



Feb. 7., 1933. v J. c. DAWSON 1,896,838

LOSE LEAF BINDER Filed Feb. 28, 1931 2 SheecS-Sl'leei'l l fmzes Dad/5072 Feb. 7, 1933. I 1 (1 -DAWSON 1,896,838

LoosE LEAF BINDER Filed Feb. 28, 1931 2 sheets-sheet 2 fmzes C, Eau/50m Patented Feb. 7, 1.933

UNITED STATI-:Nsy

JAMES c. nAwsOimOr WEBSTER Gnovns, MISSOURI, Assienon. TO r WEBSTER enovns, MISSOURIf ,PATENT Ap'pnauon neg February 2s', 1,1931. semina. 51e,135'.

This invention relates to loose leaf binders and has for its principal object to improve ythe means for attaching certain types Aof mits the book binder to use the same' cover attaching means as is used with more expensive metals, serves to strongly bind the ends of the metals to the cover base, and provides a ready and rm support Vfor the booster lever, the lack of which Withthis type of metal has ever been an annoyance. *Having tooled up to make the fittings for the cheaper metals, a manufacturer can readily and economically eXtendtheir use to the moreexpensive binder metalsffv The recited vobjects and others will become apparent 'from vthe specification and the`a`nneXed drawings, Jin which Fig. 1 is a perspective view of a loose lea'I` binder incorporating the invention;'

Fig. 2 is a vertical, longitudinal Msectionof the end portion of the binder; i

Fig. v3 is a transverse, vertical section on the line 3*?) of Fig. 1; Fig. 4 is a bottom plan view of the end of the binder; y u

Fig. 5 is a detail' of" a modification showing the booster supportk in vertical, longitudinal section', Fig. illustrates in perspectivethe booster lever and booster lever support;l l Fig. 7 is a` transverse, vertical `,sectionl through -amodified form of the device, taken ,adjacent the end ofthe binder and looking outwardly;` j

Fig. 8 illustrates in perspective the parts shown in Fig.4 7;

' Fig. 9V is abottoin plan vievv vlshfowiing.a.

aperture 22 yis cut through. the central portion with itfthe fulcruni portionf29 may bev curved further modiiication' of the applied 4to the binder; Fig.f 10 illustrates in perspective the parts shovvn'inFig 9;

k Figf v11 illustr boosterlever,

.tes the v booster lever f and booster lever support as modifiedv for use with binders of thelspring backftype;`

nLMA N. DAWSON, or

Fig. 12 shows in vertical, longitudinal ,l

section the booster lever `and booster lever Support" appliedto spring back binders Fig. 13 illustrates a booster lever support adapted to be inserted in binders ofthe spring back type; and

" Fig; 14 imaginas a ffaii? modification of support applied to binders offthis type. The binder, generally indicated by 10, comprises a spring cover plate 11 having hooked 'Y 'margins' 12 and13 in Which'are retained the articulated toggle plates ',121 and 15. Awhich bear ,paper-holding prongsl and 1 7.

hookedlmargins 12 and lffalso engage the outer edgesfofithe tongue 18 of av booster leversupp-ort 19. Preferably the tongue yhas innige a andi, a. win be seenthatthe a. transverse curvature substantially corre- Spending to'that'of the bookfback 21V`ada'pting'itto Alieclosely against the back.v An Y i ofthe ftonguefth'roughwhich the loop 23 struck up from the :book back projects.V

portion'24 of theusupportlp is lbem, Substan; tiauy .al'fght-angles tothe axis of thertongue .18 andV formsa 'close vittingfend closure Lfor 'y the bindermechanism. Slots25 and 26]are,

cut in the end closure. Thelboosterlever 27 comprises afthumb arm 2.8;, afulcrum portionY 31. The ulcrum Vportion29 ts within the Slot 25 and `consequently the lower marginfofl ties of the portion 29.`

,Ipreferfto forma coverretainingor' supv` l Parting sheulderf. jup'on. the' hasta .snpm0 .29, a connecting arm 30 and anoperating ar`m .the slot` supports theb'ooster lever.; Support .is given across the Wholeextent of the' fulpoints of supportareat the outer veltreini- 9 5 forth sake of appearance. `In this case, the C port vby turning it inwardly along an arc corresponding to the transverse curvature ofthe i' cover plate. A shoulder 32may either overlie the cover plate as indicated in Figs. and 3, or pass under it, as sho-wn in Fig. 5. T he latterconstruction has the advantage of st1ffening Vthe cover` Aplate where it is mostfre'- overlies a small end portion -of the togglel quently bent by operators pushing `upon the cover plateinsteadof upon the booster levers. With either arrangement, thefshoulder k32 plates 14 and 15. There is, consequently',`lno

' danger that'an upward jerk upon the prongs i .y In I assembly, the

16, 17 will snap the tongue out'from engagement with the hooked margins `12fand 13=of the cover plate.' f i ,toggle plates are either sprung into the 'retainingl spring' or l the spring is rolled down about them, producing asub-assembly which possesses neither booster levers nor supports.' Thebooster lever is Y then insertedthrough the slot- 25,andthe assembly Vpushed into-the end'of thelooseleaf binder. The configuration of the booster le# Y veris suchthatitis retained in position by Y the; engagement lof theconnecting armV with theinner face 36 of the booster'support.

1 Preferably, the slot 25 islocatedabove the toggle plates'12 and 13 andthearmfSO'eX- tends across their ends whilejthe operating arm 31 extends beneath the plates to lift them. 7

i If small notches 33 are the tongue,

thecover maybe bent into them as indicated at 34', 34, Fig. 4, which.'willprevent thesupports and boosterl levers being displaced when the binder metals -aref shipped andjbefore i they are assembled to the book/backs.` i l r ,fUpon'assemblyfto thebookback, the binder YT "is placed so jthat'the apertures 22 pass over ythejlcops 23 anda key 35 isdriven through the slot26and underthe 4loop "to lockthe fjIn the modification illustrated 'in- Figs. 7' and 8, the booster lever support. 37 carries twol smallinwardly extending lugs 38', 38`which replace theshoulder 32`of the other supports.

'The ,booster lever .39 is slottedat 40,40 to'give clearance tothe'lugs 38, 38. VAs indicated, the V 5.0.

s lot isicut both 'into the horizontal body portion 41 rand into the verticalconnecting varm 42. The lever isfulcrumed along'the underfside ofthe body portion 41 which engages the margin 43 ofthe 'endclosure portion 44. YIf the boosterjlever39 be flat, support is given to.ithegentire'body portion' 41.` "Preferably,

Y fhowever`,`the` thumb arm 45 and thebody 'Y Y.port`ionj4`1j'are curved, and as a consequence, the lever isy fulcrum'ed only adjacentfthe in- Lnerends of Ytherslots 40, 40. AThe llug'S'SS, 38 Vmay'jeither extendover the cover `plate 46, as

,f `shown inFig. 7 or beneath theplateto give extra support.

In the modification iusfmeed ini rigs, 9 65 andV 10,'thethumbarm 47 of Vthe booster .lever 48 @is reduced in 'size and is assembled by' passing itoutwardly through the slot 49 in the booster support 50 instead of passing it inwardly as must be done with the forms il- -lustrated in Figs. 2,3 and`4.i The-wings 51, 51 may be formed upon the connecting arm 52V tov prevent the booster from slidin out through the slot 49 before assembly. assembly, the booster is held in positionfbee tween the end closure 53 and the toggle plates. As before stated, it is to the manufacturers 'advantage to Yapply such booster supports fter to binders ofthe spring back type as well'.` v

` A supporta'dapted` for such binders is illustrated inFigs. 11, 12 and 13 andv comprises,

as',v before, Aatongue 54,y "aclosure' 55', and a shoulder 56. Preferably, the-transverse 4diinension ofthe tongue 54 isrnarrowerjthan vthat 'of thev types V']i irevic usly indicated, so

fthat ample clearance may bek 'given tothe toggleplates.` lAn'"aperture 57is yformed in the tongue and engages the loop`58st`ruck up from the vbook back y59.A

yIt is not necessary thatfthembboster,supports be provided withiaslot in which f th'e v 30 boosters arefpvot'ed, for, as'indicatedin Figs.`

5.7', Sand 14, the booster'may be pivotedfupon the uppermargin of the closure 37 orGOand retainedV against displacement' by the cover' plate y46 Aorg/61. I Vprefer the 2Vother' forms,

however, since with a shoulder upon the fit'- f ting, thereis no danger Vof the binder cominglocsef f y.. Y.

TI claimt:

. *1. In a loosey leaf binder, aplate archedV A tifanSverSely Witl1 the'sds'ftilmedinwardly (prong-bearing. toggle i members. articulated 'at their adjacent edges Vto forni` a toggle joint fthe toggle joint to open the prongs.`

. turned inwardly, prong-bearing toggle-mem- Y bers .articulated at their adjacent edges to forni a'togg'le joint 'and'y having their remote edges mounted to rotate on the inturned sides of the plate, anda fitting comprising a Vbody member engaging with theinturned' sides of thefplateand 'adapted to cooperate with attaching' means' fora'cover. n

3.111 a loose leaf binder, Vai plate'arched transversely withy the sides'turned inwardly,

rotate fon ,the` inturned "sides of. the plate,- a Yfittingy comprising yabody member' engaging "with the` inturned :sides 'of 'the platejand y,adaptedfto cooperate with Vattaching. means.

"'for'a cover, an u'pturnedend 'on the'bodyv prong-bearing toggleV members articulated'k at theirkadjacent edges to form a toggle'jointY fand having ,their remote` edges-mountedto the toggle members to open the prongs.

4. In a loose leaf binder, a plate arched 5 transversely with the crown up and the sides turned inwardly, prong-bearing toggle members articulated at their adjacent edges to Y form a toggle joint and having their remote edges mounted to rotate on the inturned sides member engaging with the inturned sides of the plate and adapted tov cooperate with at# taching means for a cover, an upturned end on the body member and a booster lever eX- tending through a slot in the upturned end and having one arm extending beneath the toggle plates to lift them.

5. In a loose leaf binder,` a plate arched transversely with the crown up and the sides turned inwardly, prong-bearing toggle mem-V bers articulated at their adjacent edges to form a toggle joint and having their remote edges mounted to rotate on the inturned sides of the plate, a tting comprising i a body member engaging with the inturned sides of the plate and adapted to cooperate with attaching means for a` cover, and a booster lever fulcrumed on the end of the fittingand cooperating with the toggle members to open the prongs.

6. In a loose leaf binder, a plate arched transversely with the crown up and the sides turned inwardly, prong-bearing toggle members articulated at their adjacent edgesto form a toggle joint and having their remote edges mounted to rotate on the inturned sides of the plate, a fitting comprising a body member engaging with the inturned sides of the plate and adapted to cooperate with attaching means for a cover, and an upturned and slotted end on the body member having anin-y wardly directed flange telescoping withthe end portion of the plate.

7. In a loose leaf binder, a Aplate arched bers articulated at their adjacent edges to form a, toggle j oint-andhaving their remote edges mounted to rotate on the inturned sides of the plate, a fitting comprising a body member engaging with the inturned sides of the plate and adapted to cooperate with attaching meansfor a cover, an upturned and slotted Vend on the body member having an Vinwardly directed flange telescoping with the end portion of the plate, and a booster lever extending through a slot in theupturned end and having onearm cooperatingwith the toggle joint to open the prongs.

8. In a `loose leaf binder, a plate arched transversely with thecrown up and the sides turned-inwardly, prong-bearing toggle members articulated at their adjacent edgesl to form atoggle joint and having their remote edges mounted to rotate on the inturned sides of the plate, a fitting comprising a bodyV transversely with the crown up and the sides turned inwardly, prong-bearing toggle memof the plate, a fitting comprising a body member engaging with the inturned sides of the;` plate and adapted to cooperate with attach` ing means for a cover, and an upturned and slotted end on the body member having an inwardly directed ange telescoping with the end portion of the plate and a booster lever extending through the slot and engaging the toggle platesand engaging their outer marglnf Y 9. Means for attac-hing booster levers vrto a loose leaf binder,V comprising a support adapted to itrwithin` the binder having a back-engaging portion, la booster support give clearance to a retaining loop. y

portion, and a cover plate engaging portion V 10.l In a loose leaf ybinder having `toggle plates, a booster lever support havinga slot f therein, a booster lever nivoted therein, an

arm on said lever to engage the toggle plates, Y and a portion of the lever engaging the face ofsaidv support to'maintain the lever within the binder. n y

' 1l. In a looseleaf binder, an arched Spring, toggle plates mounted in said spring, a support for a booster lever yhaving a tongue parallel toi-the toggle plates, a portion normal thereto having a slot therein, a booster lever y i pivoted in said -slot and aportion' ofV the booster preventing theoutward longitudinal movementV of the lever. Y y.

Y l2. A loose leaf binder including an arched spring and toggleplates mounted therein, a book back provided with a retaining loop, a lsupport having a tongueV providedwith an aperture adapted to engage the loop, and a booster lever in said support. j'

13. A loose leaf binder having a book` back provided4 with a retaining loop, a spring back having an aperture cooperating with` Y the loop, a support having a tongue cooperat- 1 and articulated to form a toggle joint, the.

combination of a booster lever havinga lifting with saidloop whereby said support is t retained against longitudinal movement, and

ing arm to operate the toggle members', a'supi porting member extending Y between the flanges and below the toggle members, means g for securing the supporting member in place and means von the supporting member to form a fulcrum for the booster leverfand to retain it in position.

` In testimony whereof I affix my signature. V i

JAMES C. DAVVSO'N.'Y i 

